From: Marc MERLIN <marc@merlins.org>
To: Chris Samuel <chris@csamuel.org>
Cc: "Chris Mason" <chris.mason@fusionio.com>,
"linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>,
"Ted Ts'o" <tytso@mit.edu>, "Lukáš Czerner" <lczerner@redhat.com>,
linux-ext4@vger.kernel.org, axboe@kernel.dk,
"Milan Broz" <mbroz@redhat.com>
Subject: Re: How can btrfs take 23sec to stat 23K files from an SSD?
Date: Tue, 31 Jul 2012 23:40:10 -0700 [thread overview]
Message-ID: <20120801064010.GJ12695@merlins.org> (raw)
In-Reply-To: <5018CE66.6050609@csamuel.org>
On Wed, Aug 01, 2012 at 04:36:22PM +1000, Chris Samuel wrote:
> On 01/08/12 16:01, Marc MERLIN wrote:
>
> > Third, A freshly made ntfs filesystem through fuse is actually FASTER!
>
> Could it be that Samsungs FTL has optimisations in it for NTFS ?
>
> A horrible thought, but not impossible..
Not impossible, but it's can be the main reason since it clocks still 2x
slower with ntfs than a spinning disk with encrypted btrfs.
Since SSDs should "seek" 10-100x faster than spinning disks, that can't be
the only reason.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
next prev parent reply other threads:[~2012-08-01 6:40 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-25 15:45 du -s src is a lot slower on SSD than spinning disk in the same laptop Marc MERLIN
[not found] ` <alpine.LFD.2.00.1207252023080.4340@(none)>
2012-07-25 23:38 ` Marc MERLIN
2012-07-26 3:32 ` Ted Ts'o
2012-07-26 3:35 ` Marc MERLIN
2012-07-26 6:54 ` Marc MERLIN
2012-08-01 5:30 ` Marc MERLIN
2012-08-01 6:01 ` How can btrfs take 23sec to stat 23K files from an SSD? Marc MERLIN
2012-08-01 6:36 ` Chris Samuel
2012-08-01 6:40 ` Marc MERLIN [this message]
2012-08-01 8:18 ` du -s src is a lot slower on SSD than spinning disk in the same laptop Spelic
2012-08-16 7:50 ` Marc MERLIN
[not found] ` <502CC2A2.4010506@shiftmail.org>
2012-08-16 17:55 ` Marc MERLIN
2012-09-05 16:52 ` ext4 crash with 3.5.2 in ext4_ext_remove_space Marc MERLIN
2012-09-05 17:50 ` Lukáš Czerner
2012-09-05 17:53 ` Marc MERLIN
2012-09-06 4:24 ` Marc MERLIN
2012-09-07 15:19 ` Marc MERLIN
2012-09-07 15:39 ` Lukáš Czerner
2012-09-07 15:51 ` Marc MERLIN
[not found] <201207222135.11159.Martin@lichtvoll.de>
[not found] ` <20120202124241.GW16796@shiny>
[not found] ` <20120718220446.GB3888@merlins.org>
[not found] ` <20120722185848.GA10089@merlins.org>
[not found] ` <20120722204428.GC3925@merlins.org>
[not found] ` <20120722224145.GC12951@merlins.org>
[not found] ` <20120723064202.GB6931@merlins.org>
[not found] ` <20120727110835.GA6933@shiny>
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